In-situ stress measurement at a candidate repository horizon. [Umtanum flow]

Conference · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6860330

Kim, K; Haimson, B C

The state of in-situ stress under the Hanford Site has attracted attention in recent years because of the core disking phenomenon observed during exploration drilling, an indicator of likely high horizontal stress. Efforts made to elucidate this phenomenon by core analysis and numerical modeling studies have enhanced the understanding of the rock failure mechanism and served to delineate approximate conditions for which disking might occur. The hydraulic fracturing stress measurements conducted in the Umtanum flow in fiscal year 1982 provided, for the first time, direct and quantitative information on the stress state of a candidate repository horizon in basalt. This paper summarizes the measurement method employed, the test results, and future Basalt Waste Isolation Project (BWIP) plans. 4 figures.

• Research Organization: Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations; Wisconsin Univ., Madison (USA)
• DOE Contract Number: AC06-77RL01030
• OSTI ID: 6860330
• Report Number(s): RHO-BW-SA-257-P; CONF-821205-13; ON: DE83001748
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
580300 -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
BASALT
COMMINUTION
DRILL CORES
FAILURES
FRACTURING
HANFORD RESERVATION
HYDRAULIC FRACTURING
IGNEOUS ROCKS
NATIONAL ORGANIZATIONS
ROCKS
STRESSES
US DOE
US ERDA
US ORGANIZATIONS
VOLCANIC ROCKS